<!DOCTYPE html>  
<html>  
<head>  
<meta charset="UTF-8" />  
<title>Insert title here</title>  
</head>  
<body>  
            错误信息：<h4 th:text="${msg}"></h4>  
       <form action="" method="post">  
           <p>账号：<input type="text" name="username" value="admin"/></p>  
           <p>密码：<input type="text" name="password" value="123456"/></p>  
           <p><input type="submit" value="登录"/></p>  
       </form>  
</body>  
</html> 